1、[4GHz]: The optical pocket pen mouse uses 4GHz wireless connection technology, with bluetooth wireless transmission, and the distance up to 397in. 2、[Ergonomic Design]: The wireless mouse pen adopts the ergonomic design, effectively reduces the pressure when the button is triggered, feel comfortable and not easy to produce fatigue. 3、[200mAh Lithium Battery]: The handwriting mouse built in 200 mAh large capacity rechargeable lithium battery, recyclable charging, environmental protection and convenient. 4、[High Compatibility]: The stylus mouse is compatible with various devices, suitable for laptops, tablets, smart phones, for Android phones and tablets and for WIN system with Bluetooth. Do not support for IOS. 5、[Optical Sensor Tracking]: The wireless mouse pen uses optical sensor tracking technology, accurate movement, high sensitivity, coherent writing, quick response and no delay. 6、[2 Modes]: The bluetooth mouse pen has two modes, can switch between desktop mode and air mode, with a middle button function, suitable for drawing CAD people.